231434441261 has 2 divisors, whose sum is σ = 231434441262. Its totient is φ = 231434441260.

The previous prime is 231434441239. The next prime is 231434441323. The reversal of 231434441261 is 162144434132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175566028036 + 55868413225 = 419006^2 + 236365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231434441261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231434441761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115717220630 + 115717220631.

It is an arithmetic number, because the mean of its divisors is an integer number (115717220631).

Almost surely, 2^231434441261 is an apocalyptic number.

It is an amenable number.

231434441261 is a deficient number, since it is larger than the sum of its proper divisors (1).

231434441261 is an equidigital number, since it uses as much as digits as its factorization.

231434441261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 35.

Adding to 231434441261 its reverse (162144434132), we get a palindrome (393578875393).

The spelling of 231434441261 in words is "two hundred thirty-one billion, four hundred thirty-four million, four hundred forty-one thousand, two hundred sixty-one".